PDFWAC 296-874-20048
Protect employees from weather hazards.
(1) You must prohibit work on or from scaffolds during storms or high winds unless both of the following are met:
(a) A competent person has determined that it is safe for employees to be on the scaffold;
(b) The employees are protected by either:
(i) A personal fall arrest system; or
(ii) Wind screens.
(2) You must make sure wind screens are not used unless the scaffold is secured against the anticipated wind forces.